Arabic Presentation Forms-B

• Test rendering across fonts and browsers to ensure these presentation-forms are applied correctly without breaking text layout.
• Use explicit font fallback and avoid relying on system defaults for accurate glyph shapes.
• Validate bidirectional behavior and isolate/medial forms so adjacent Arabic text remains coherent.
• Provide accessible alternatives when these forms affect line breaks or cursor movement; document when they are essential.
• Document and enforce consistent usage guidelines, including when to enable or disable these forms in your app.

Arabic Presentation Forms-B comprises code points meant to support contextual shaping in certain rendering environments. It is primarily a compatibility layer rather than a daily typography tool. Understanding its role helps manage legacy data and ensure consistent display.

Typical usage centers on legacy systems, font infrastructures, and environments with limited shaping capabilities. Be aware of common pitfalls like inconsistent glyph selection, broken ligatures, or unexpected spacing when these forms are mixed with modern Arabic typography. Historically, these forms arose to address rendering gaps and to support interoperability across platforms, but modern text engines often render Arabic correctly without relying on these code points.